If you have a card that uses errata text in your deck, you must have a printed copy of the errata text available while playing, and you must inform your opponent of the errata text the first time the card would be viewable by your opponent
However, in order to make your deck artifact dense enough to hit consistently, you'll often have to include a few less than stellar cards
Kyoshi Warriors Invasion Reinforcements White Lotus Reinforcements Earth Kingdom Soldier Compassionate Healer Jet, Freedom Fighter Serpent's Pass The Cave of Two Lovers Tolls of War TierB- Bender's Waterskin Momo, Playful Pet Sokka, Lateral Strategist Gran-Gran Forecasting Fortune Teller Earth Kingdom Protectors Messenger Hawk The Mechanist, Aerial Artisan Agna Qel'a Deadly Precision Cat-Gator TierC+ Badgermole Knowledge Seeker Sold Out Kyoshi Battle Fan Firebending Lesson Airbender's Reversal Glider Kids Guru Pathik Boiling Rock Prison Kyoshi Village Misty Palms Oasis Watery Grasp Canyon Crawler Octopus Form TierC Jeong Jeong's Deserters Fire Nation Warship Merchant of Many Hats First-Time Flyer Pretending Poxbearers Toph, the Blind Bandit Enter the Avatar State Otter-Penguin Katara, Bending Prodigy It'll Quench Ya
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Depending on how much you want to spend to optimize your land base and include tutors to search for these combo pieces, you could likely take this deck as high as level five